Author
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Yu, Ming |
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Submitted to: Genetics and Breeding of Sugar Beet
Publication Type: Book / Chapter Publication Acceptance Date: 3/20/2004 Publication Date: 3/20/2005 Citation: Yu, M.H. 2005. Root-knot nematode. pp. 109-111. In (eds. E. Biancardi, L.G. Campbell, G.N. Skaracis, & M. DeBiaggi) Genetics and Breeding of Sugar Beet. Science Publishers, Inc. Enfield (NH), USA. (Book Chapter) Interpretive Summary: Root-knot nematodes, Meloidogyne spp., cause extensive damage to a wide variety of economically important crops, including sugar beet. The nematode induces root gall symptoms that not only greatly affect sugarbeet yields but also reduce quality. Through over ten years research effort not only the essential nematode resistance has been identified, that resistance also been introgressed into cultivated sugarbeet. In this section: (i) the life cycle of Meloidogyne spp. And infestation phenomena; (ii) the specificity and strength of nematode resistance; (iv) the isozyme and molecular markers that linked to resistance; and (v) the sugarbeet root-knot resistance breeding will be described in detail. Technical Abstract: Due to the root-knot nematodes' extensive host range, management through crop rotation and cultivation practices becomes ineffective. Fumigation was the most reliable means of control, but environmental concerns have restricted nematicide usage. Application of soil fumigant Telone (1, 3-dichloropropene) has been prohibited in California since 1990, and methyl bromide (an ozone-depleting fumigant) is being phased out by 2005 under terms of the 1991 Montreal Protocol. Planting nematode-resistant sugar beet, therefore, would be the most economical and environmentally sound tactic. Source of resistance to root-knot nematode has been identified. The resistance is effective against six species of Meloidogyne. Breeding sugarbeet resistance to root-knot nematode is on-going progressively with the use of MAS selection and field trials. |
